Cotter-pin extractor.



I. A. ANDERSON. y CUTTER PIN EXTRACTOR. APPLICATION FILED SEPT. I9,I9I6.

Patented Apr. 10, 1917.

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JOHN A. ANDERSON, OF BRIDGEPORT, CONNECTCUT, ASSIGNOR OF ONE-HALF T0ORVILLE MORTON, OF BRIDGEPORT, CGNNECTIECUT.

CO'ITER-PIN EXTRACTOR.

mmm-"mamma Specicaton of Letters Patent.

Patented Apr. iii, i917.

To all whom t may concern.

Be it known that I, JOHN A. ANDERSON, a citizen of the United States,residing at Bridgeport, in the county of Fairfield and State ofConnecticut, have inventedy certain new and useful lmprorements inCotter- Pin Extractors, of which the following is a specification.

The invention relates to new and useful improvements in extracting toolsdesigned for withdrawing cotter pins 'from bolts, shafts, and the like,and which will serve to straighten the shanks of such pins as they arewithdrawn so that they may again be used without necessitating anyspecial operation for straightening the shanks in order to permit theirreinsertion in the opening of the bolt or shaft from which they may havebeen withdrawn.

The object of the invention is to provide a tool which may be readilyattached to the head or eye of a cotter pin, and having sufficientlongitudinal extracting movement to adapt the tool to various sizes ofpins now commonly in use, the operation and arrangement being such thatthe first movement of the handle members will serve to lock the tool tothe pin, and then cause the extraction of the pin from its confiningopening.

The invention consists in certain peculiar details of construction,combination, and arrangement of parts as will be hereinafter fullydescribed and then claimed.

ln the drawings illustrating the invention, in the several gures ofwhich like parts are similarly designated, Figure l is a. plan view ofthe tool in its open position. Fig. 2 is a sectional plan view of thesame. Fig. 3 is a sectional plan view of the tool illustrating it in itsclosed position, this is to say, the position occupied by the handles aswhen extracting a pin. Fig. 4 is a transverse section drawn on the line4-4 0f Fig. 2.

1 designates the head of the tool having a longitudinal opening orchannel 2, (rectangular in cross section), extending entirely throughthe same, and having parallel side walls as shown in Figs. 2 3, and 4.Slidably retained within the opening or channel 2 are arms 3 havingtheir outer ends terminating in substantially semicircular gripping jaws4, designed to encircle the eye of a cotter pin as will be hereinafterfurther explained. IThe arms 3 are pivoted together adjacent to theirinner ends upon a pin 5, which pin 5 also serves to pivotally connectthe arms 3 to the inner ends of links 6, the latter having their outerends pivoted at 7, to operating handles 8, the inner ends of the handlesbeing pivotally supported upon stud bolts 9 carried by ears 10 extendingfrom the sides of the head 1. The said handle members 8 are normallyheld in an expanded or open position by springs 11 carried by the studbolts 9, each spring having one end held in and engaging the side of arecess formed in each side of the head 1, and its opposite end engagingthe respective members of the handle S, as clearly shown in Figs. 2 and3. The inner ends of the arms 3 are formed with extensions 12, betweenwhich is interposed an expansion spring 13, which serves to force theinner ends of the arms 3 outwardly, and consequently to hold thegripping jaws 4 open when the handle members 8 are in their extendedposition.

As will be noted, the outer faces of the gripping jaws 4 aresubstantially semi-circular in plan, and thus provide cam surfaces 15 topermit the said jaws 4 to easily ride over the outer edges of theopening or channel 2 when the handles 8 are forced together, and henceto easily force the outer ends of the jaws 4 toward each other, and toclose the mouth 14 thereof.

ln the use of my device the tool is adjusted so that the gripping jaws 4will aline with the eye of the Cotter pin, as shown in dotted lines inFig. 2, then by gripping and forcing the handle members 8 together (asshown by the arrows in Fig. 2), the first movement of the said handlemembers will, through the medium of the links 6, draw the arms 3inwardly and thus bring the cam surfaces 15 of the jaws 4 intoengagement with the edges 16 of the opening or channel 2 of the head 1,hence forcing the jaws 4 together and forcing the ends of the jawsthrough the eye of the cotter pin, as shown in Fig. 3; then by acontinued movement of the handle members 8, the arms 3 will be drawninwardly through the opening or channel 2 of the head. This movementwill consequently throw the outer end of the head into engagement withthe side of the shaft, or the side of the nut of a bolt, from which thepin is to be withdrawn, when upon a further movement of the handles 8the arms will be further drawn into the opening of the head l to thuswithdraw the pin from its opening in the shaft or bolt as the case maybe, it being noted that the head l is formed upon its top and bottomportions with slots 17 opening through the outer end of the head so asto receive the head of the cotter pin as it is withdrawn.

It will thus be seen that the operation, as well as the tool itself, isexceedingly simple. I have found from actual experience that I canwithdraw a cotter pin with but very slight exertion, irrespective of theangle at which the shanks of the pin have been previously bent, andwithout injury to the pin.

I do not claim broadly the idea of providing a device for extractingcotter pins from bolts or shafts, as I am aware that other devices forthis purpose are now on the market,

- but I do claim that heretofore no device has been devised whereinthere is employed an extractor having jaws moving simultaneously withinthe head of the tool, and adapted to lock within the eye of a cotterpin, and requiring but a single mechanical movement to extract the pin,such as is vshown in my device.

What I claim is l. A cotter pin extractor, comprising a head having achannel-way and a recess formed therein, said recess being adapted toreceive the eye of a cotter pin, extracting arms slidably retained insaid head having their outer ends terminating in cam surfaces adapted toengage the sides of said channelway, handle members pivotally connectedto said head and to the inner ends of said arms, springs engaging saidhandle members and springs engaging said extracting arms for holdingthem in a normally open position.

2. A cotter pin extractor, comprising a head having a longitudinalopening or channel-way formed therein, extracting arms slidably retainedin said opening or channelway having their outer ends terminating injaws, the outer faces of said jaws providing cam surfaces, and operatinghandles pivotally connected to said head and operatively connected tosaid arms, whereby, as the handle members of the extractor are forcedt0- ward each other, the said jaws will be caused to enter the eye ofthe cotter pin and thereafter to exert a pulling or extracting movementupon the cotter pin.

8. A cotter pin extractor, comprising a head having a longitudinallyarranged opening or channel-way formed therein and slots opening throughthe outer end of said longitudinal opening or channel-way, arms slidablyretained in said opening or channel-way having their outer endsterminating in jaws, the outer faces of said jaws providing camsurfaces, operating handles pivotally connected toY said head andoperatively conhead of the extractor,

nected to said arms, and means associated with the inner ends of saidarms for holding the outer ends thereof in an open position when thehandle members of the extractor are in an open or extended position.

4;'. A cotter pin extractor, comprising a head having a longitudinalopening or channel-way formed therein, extracting arms slidably retainedin said opening or channel-way having their outer ends terminating injaws, the outer faces of said jaws providing cam surfaces adapted forengagement with the outer edges of the opening or channel-way of thehead, whereby to contract the said jaws and cause them to engage the eyeof a cotter pin and thereafter to withdraw the cotter pin as the armsare drawn into said head, and handle members operatively connected tothe inner ends of said arms,-as and for the purpose speciiied.

5. A cotter pin extractor, comprising a head having a longitudinalchannel-way and provided with recesses in its upper and lower surfaces,said recesses adapted to receive the eye of a cotter pin, extractingarms movably retained in said head having their outer ends terminatingin gripping jaws, the outer surfaces of said jaws being curved toprovide cam surfaces adapted to engage the walls of said channel-waywhereby to close the said gripping jaws when the extracting arms aredrawn into said head, handle members operatively connected to said headand to the inner ends of said extracting arms, and independent springsfor normally holding said arms and said handle members in a normallyopen position.

6. A cotter pin extractor, comprising a head having a longitudinalopening or channel-way extending therethrough, said head having slots inits upper and flower surfaces opening through the outer end of saidhead, arms slidably retained insaid openingH or channel-way having theirouter ends terminating in gripping jaws, the outer faces of said jawsbeing substantially semi-circular in plan providing cam surfaces, handlelevers pivotally connected to'said head and operatively connected to theinner ends of said arms, whereby, as said handle members are operated,the outer ends or jaws of said arms will be caused to first enter theeye of the cotter pin and then to be drawn into the as and for thepurpose specified.

7. A cotter pin extractor, comprising a .head having an opening orchannel-way extending longitudinally therethrough, extracting armscarried by and Vmovable through said opening or channel-way,-said armshaving jaws at their outer endsgadapted to engage the eye of a cotterpin, handle members pivotally connected to said head, links pivotallyconnecting'the inner ends of said extracting arms and said handlemeinbers, springs for normally holding said handle members in anextended or open position, and a spring associated with the inner endsof said extracting arms for holding their outer ends or jaws in an openposition when said handle members are extended.

8. A cotter pin extractor, comprising a head having a longitudinalopening or channel-way formed therein, extracting arms arranged withinand movable through said opening or channel-way, said arms having theirouter ends terminating in jaws the outer faces of which are curved toprovide cam surfaces, handle members pivotally connected to said head,links connecting said handle members with the inner ends of saidextracting arms, springs for normally holding said handle members in anextended or open position, and a spring associated with the inner endsof said extracting arms for holding their outer ends in an open positionwhen said handle members are in an extended position.

9. A cotter pin extractor, comprising a head having an opening orchannel-way extending longitudinally therethrough, and having open slotsin the opposite faces thereof, extracting arms movable through saidopening or channel-way, the outer faces of said arms terminating ingripping jaws, operating handles pivotally connected to said head, linksconnecting said handles with the inner ends of said arms, and a springarranged between the inner ends of said arms for forcing the outer endsthereof apart when the said handle members are in an extended position.

10. A cotter pin extractor, comprising a head having an opening orchannel-way extending longitudinally therethrough, extracting armsarranged within and movable through said opening or channel-way, saidarms having jaws at their outer ends adapted to engage the eye of aveotter pin, the outer faces of said jaws being substantiallysemicircular in plan providing cam surfaces adapted to engage the innerwalls of the opening or channel-way of said head whereby to close thesaid jaws as the arms are drawn within the said opening or chamielway,operating levers pivotally connected to said head, links connecting saidlevers with the inner ends of said arms, and springs for respectivelyholding said handle members and the outer ends of said arms in anextendddor open position, substantially as speciln testimony whereof lhave hereunto set my hand this 28th day of August, A. D.

JOHN A. ANDERSON. Witnesses:

Srorswooo D. Bowers, M. E. HITCHCOCK.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

